Copy the soc_camera based driver in v4l2 sensor driver directory.
This commit just copies the original file without modifying it.
No modification to KConfig and Makefile as soc_camera framework
dependencies need to be removed first in next commit.

Signed-off-by: Jacopo Mondi <jacopo+rene...@jmondi.org>
Acked-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
Acked-by: Hans Verkuil <hans.verk...@cisco.com>
---
 drivers/media/i2c/tw9910.c | 999 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 999 insertions(+)
 create mode 100644 drivers/media/i2c/tw9910.c

diff --git a/drivers/media/i2c/tw9910.c b/drivers/media/i2c/tw9910.c
new file mode 100644
index 0000000..bdb5e0a
--- /dev/null
+++ b/drivers/media/i2c/tw9910.c
@@ -0,0 +1,999 @@
+/*
+ * tw9910 Video Driver
+ *
+ * Copyright (C) 2008 Renesas Solutions Corp.
+ * Kuninori Morimoto <morimoto.kunin...@renesas.com>
+ *
+ * Based on ov772x driver,
+ *
+ * Copyright (C) 2008 Kuninori Morimoto <morimoto.kunin...@renesas.com>
+ * Copyright 2006-7 Jonathan Corbet <cor...@lwn.net>
+ * Copyright (C) 2008 Magnus Damm
+ * Copyright (C) 2008, Guennadi Liakhovetski <ker...@pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/init.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/delay.h>
+#include <linux/v4l2-mediabus.h>
+#include <linux/videodev2.h>
+
+#include <media/soc_camera.h>
+#include <media/i2c/tw9910.h>
+#include <media/v4l2-clk.h>
+#include <media/v4l2-subdev.h>
+
+#define GET_ID(val)  ((val & 0xF8) >> 3)
+#define GET_REV(val) (val & 0x07)
+
+/*
+ * register offset
+ */
+#define ID             0x00 /* Product ID Code Register */
+#define STATUS1                0x01 /* Chip Status Register I */
+#define INFORM         0x02 /* Input Format */
+#define OPFORM         0x03 /* Output Format Control Register */
+#define DLYCTR         0x04 /* Hysteresis and HSYNC Delay Control */
+#define OUTCTR1                0x05 /* Output Control I */
+#define ACNTL1         0x06 /* Analog Control Register 1 */
+#define CROP_HI                0x07 /* Cropping Register, High */
+#define VDELAY_LO      0x08 /* Vertical Delay Register, Low */
+#define VACTIVE_LO     0x09 /* Vertical Active Register, Low */
+#define HDELAY_LO      0x0A /* Horizontal Delay Register, Low */
+#define HACTIVE_LO     0x0B /* Horizontal Active Register, Low */
+#define CNTRL1         0x0C /* Control Register I */
+#define VSCALE_LO      0x0D /* Vertical Scaling Register, Low */
+#define SCALE_HI       0x0E /* Scaling Register, High */
+#define HSCALE_LO      0x0F /* Horizontal Scaling Register, Low */
+#define BRIGHT         0x10 /* BRIGHTNESS Control Register */
+#define CONTRAST       0x11 /* CONTRAST Control Register */
+#define SHARPNESS      0x12 /* SHARPNESS Control Register I */
+#define SAT_U          0x13 /* Chroma (U) Gain Register */
+#define SAT_V          0x14 /* Chroma (V) Gain Register */
+#define HUE            0x15 /* Hue Control Register */
+#define CORING1                0x17
+#define CORING2                0x18 /* Coring and IF compensation */
+#define VBICNTL                0x19 /* VBI Control Register */
+#define ACNTL2         0x1A /* Analog Control 2 */
+#define OUTCTR2                0x1B /* Output Control 2 */
+#define SDT            0x1C /* Standard Selection */
+#define SDTR           0x1D /* Standard Recognition */
+#define TEST           0x1F /* Test Control Register */
+#define CLMPG          0x20 /* Clamping Gain */
+#define IAGC           0x21 /* Individual AGC Gain */
+#define AGCGAIN                0x22 /* AGC Gain */
+#define PEAKWT         0x23 /* White Peak Threshold */
+#define CLMPL          0x24 /* Clamp level */
+#define SYNCT          0x25 /* Sync Amplitude */
+#define MISSCNT                0x26 /* Sync Miss Count Register */
+#define PCLAMP         0x27 /* Clamp Position Register */
+#define VCNTL1         0x28 /* Vertical Control I */
+#define VCNTL2         0x29 /* Vertical Control II */
+#define CKILL          0x2A /* Color Killer Level Control */
+#define COMB           0x2B /* Comb Filter Control */
+#define LDLY           0x2C /* Luma Delay and H Filter Control */
+#define MISC1          0x2D /* Miscellaneous Control I */
+#define LOOP           0x2E /* LOOP Control Register */
+#define MISC2          0x2F /* Miscellaneous Control II */
+#define MVSN           0x30 /* Macrovision Detection */
+#define STATUS2                0x31 /* Chip STATUS II */
+#define HFREF          0x32 /* H monitor */
+#define CLMD           0x33 /* CLAMP MODE */
+#define IDCNTL         0x34 /* ID Detection Control */
+#define CLCNTL1                0x35 /* Clamp Control I */
+#define ANAPLLCTL      0x4C
+#define VBIMIN         0x4D
+#define HSLOWCTL       0x4E
+#define WSS3           0x4F
+#define FILLDATA       0x50
+#define SDID           0x51
+#define DID            0x52
+#define WSS1           0x53
+#define WSS2           0x54
+#define VVBI           0x55
+#define LCTL6          0x56
+#define LCTL7          0x57
+#define LCTL8          0x58
+#define LCTL9          0x59
+#define LCTL10         0x5A
+#define LCTL11         0x5B
+#define LCTL12         0x5C
+#define LCTL13         0x5D
+#define LCTL14         0x5E
+#define LCTL15         0x5F
+#define LCTL16         0x60
+#define LCTL17         0x61
+#define LCTL18         0x62
+#define LCTL19         0x63
+#define LCTL20         0x64
+#define LCTL21         0x65
+#define LCTL22         0x66
+#define LCTL23         0x67
+#define LCTL24         0x68
+#define LCTL25         0x69
+#define LCTL26         0x6A
+#define HSBEGIN                0x6B
+#define HSEND          0x6C
+#define OVSDLY         0x6D
+#define OVSEND         0x6E
+#define VBIDELAY       0x6F
+
+/*
+ * register detail
+ */
+
+/* INFORM */
+#define FC27_ON     0x40 /* 1 : Input crystal clock frequency is 27MHz */
+#define FC27_FF     0x00 /* 0 : Square pixel mode. */
+                        /*     Must use 24.54MHz for 60Hz field rate */
+                        /*     source or 29.5MHz for 50Hz field rate */
+#define IFSEL_S     0x10 /* 01 : S-video decoding */
+#define IFSEL_C     0x00 /* 00 : Composite video decoding */
+                        /* Y input video selection */
+#define YSEL_M0     0x00 /*  00 : Mux0 selected */
+#define YSEL_M1     0x04 /*  01 : Mux1 selected */
+#define YSEL_M2     0x08 /*  10 : Mux2 selected */
+#define YSEL_M3     0x10 /*  11 : Mux3 selected */
+
+/* OPFORM */
+#define MODE        0x80 /* 0 : CCIR601 compatible YCrCb 4:2:2 format */
+                        /* 1 : ITU-R-656 compatible data sequence format */
+#define LEN         0x40 /* 0 : 8-bit YCrCb 4:2:2 output format */
+                        /* 1 : 16-bit YCrCb 4:2:2 output format.*/
+#define LLCMODE     0x20 /* 1 : LLC output mode. */
+                        /* 0 : free-run output mode */
+#define AINC        0x10 /* Serial interface auto-indexing control */
+                        /* 0 : auto-increment */
+                        /* 1 : non-auto */
+#define VSCTL       0x08 /* 1 : Vertical out ctrl by DVALID */
+                        /* 0 : Vertical out ctrl by HACTIVE and DVALID */
+#define OEN_TRI_SEL_MASK       0x07
+#define OEN_TRI_SEL_ALL_ON     0x00 /* Enable output for Rev0/Rev1 */
+#define OEN_TRI_SEL_ALL_OFF_r0 0x06 /* All tri-stated for Rev0 */
+#define OEN_TRI_SEL_ALL_OFF_r1 0x07 /* All tri-stated for Rev1 */
+
+/* OUTCTR1 */
+#define VSP_LO      0x00 /* 0 : VS pin output polarity is active low */
+#define VSP_HI      0x80 /* 1 : VS pin output polarity is active high. */
+                        /* VS pin output control */
+#define VSSL_VSYNC  0x00 /*   0 : VSYNC  */
+#define VSSL_VACT   0x10 /*   1 : VACT   */
+#define VSSL_FIELD  0x20 /*   2 : FIELD  */
+#define VSSL_VVALID 0x30 /*   3 : VVALID */
+#define VSSL_ZERO   0x70 /*   7 : 0      */
+#define HSP_LOW     0x00 /* 0 : HS pin output polarity is active low */
+#define HSP_HI      0x08 /* 1 : HS pin output polarity is active high.*/
+                        /* HS pin output control */
+#define HSSL_HACT   0x00 /*   0 : HACT   */
+#define HSSL_HSYNC  0x01 /*   1 : HSYNC  */
+#define HSSL_DVALID 0x02 /*   2 : DVALID */
+#define HSSL_HLOCK  0x03 /*   3 : HLOCK  */
+#define HSSL_ASYNCW 0x04 /*   4 : ASYNCW */
+#define HSSL_ZERO   0x07 /*   7 : 0      */
+
+/* ACNTL1 */
+#define SRESET      0x80 /* resets the device to its default state
+                         * but all register content remain unchanged.
+                         * This bit is self-resetting.
+                         */
+#define ACNTL1_PDN_MASK        0x0e
+#define CLK_PDN                0x08 /* system clock power down */
+#define Y_PDN          0x04 /* Luma ADC power down */
+#define C_PDN          0x02 /* Chroma ADC power down */
+
+/* ACNTL2 */
+#define ACNTL2_PDN_MASK        0x40
+#define PLL_PDN                0x40 /* PLL power down */
+
+/* VBICNTL */
+
+/* RTSEL : control the real time signal output from the MPOUT pin */
+#define RTSEL_MASK  0x07
+#define RTSEL_VLOSS 0x00 /* 0000 = Video loss */
+#define RTSEL_HLOCK 0x01 /* 0001 = H-lock */
+#define RTSEL_SLOCK 0x02 /* 0010 = S-lock */
+#define RTSEL_VLOCK 0x03 /* 0011 = V-lock */
+#define RTSEL_MONO  0x04 /* 0100 = MONO */
+#define RTSEL_DET50 0x05 /* 0101 = DET50 */
+#define RTSEL_FIELD 0x06 /* 0110 = FIELD */
+#define RTSEL_RTCO  0x07 /* 0111 = RTCO ( Real Time Control ) */
+
+/* HSYNC start and end are constant for now */
+#define HSYNC_START    0x0260
+#define HSYNC_END      0x0300
+
+/*
+ * structure
+ */
+
+struct regval_list {
+       unsigned char reg_num;
+       unsigned char value;
+};
+
+struct tw9910_scale_ctrl {
+       char           *name;
+       unsigned short  width;
+       unsigned short  height;
+       u16             hscale;
+       u16             vscale;
+};
+
+struct tw9910_priv {
+       struct v4l2_subdev              subdev;
+       struct v4l2_clk                 *clk;
+       struct tw9910_video_info        *info;
+       const struct tw9910_scale_ctrl  *scale;
+       v4l2_std_id                     norm;
+       u32                             revision;
+};
+
+static const struct tw9910_scale_ctrl tw9910_ntsc_scales[] = {
+       {
+               .name   = "NTSC SQ",
+               .width  = 640,
+               .height = 480,
+               .hscale = 0x0100,
+               .vscale = 0x0100,
+       },
+       {
+               .name   = "NTSC CCIR601",
+               .width  = 720,
+               .height = 480,
+               .hscale = 0x0100,
+               .vscale = 0x0100,
+       },
+       {
+               .name   = "NTSC SQ (CIF)",
+               .width  = 320,
+               .height = 240,
+               .hscale = 0x0200,
+               .vscale = 0x0200,
+       },
+       {
+               .name   = "NTSC CCIR601 (CIF)",
+               .width  = 360,
+               .height = 240,
+               .hscale = 0x0200,
+               .vscale = 0x0200,
+       },
+       {
+               .name   = "NTSC SQ (QCIF)",
+               .width  = 160,
+               .height = 120,
+               .hscale = 0x0400,
+               .vscale = 0x0400,
+       },
+       {
+               .name   = "NTSC CCIR601 (QCIF)",
+               .width  = 180,
+               .height = 120,
+               .hscale = 0x0400,
+               .vscale = 0x0400,
+       },
+};
+
+static const struct tw9910_scale_ctrl tw9910_pal_scales[] = {
+       {
+               .name   = "PAL SQ",
+               .width  = 768,
+               .height = 576,
+               .hscale = 0x0100,
+               .vscale = 0x0100,
+       },
+       {
+               .name   = "PAL CCIR601",
+               .width  = 720,
+               .height = 576,
+               .hscale = 0x0100,
+               .vscale = 0x0100,
+       },
+       {
+               .name   = "PAL SQ (CIF)",
+               .width  = 384,
+               .height = 288,
+               .hscale = 0x0200,
+               .vscale = 0x0200,
+       },
+       {
+               .name   = "PAL CCIR601 (CIF)",
+               .width  = 360,
+               .height = 288,
+               .hscale = 0x0200,
+               .vscale = 0x0200,
+       },
+       {
+               .name   = "PAL SQ (QCIF)",
+               .width  = 192,
+               .height = 144,
+               .hscale = 0x0400,
+               .vscale = 0x0400,
+       },
+       {
+               .name   = "PAL CCIR601 (QCIF)",
+               .width  = 180,
+               .height = 144,
+               .hscale = 0x0400,
+               .vscale = 0x0400,
+       },
+};
+
+/*
+ * general function
+ */
+static struct tw9910_priv *to_tw9910(const struct i2c_client *client)
+{
+       return container_of(i2c_get_clientdata(client), struct tw9910_priv,
+                           subdev);
+}
+
+static int tw9910_mask_set(struct i2c_client *client, u8 command,
+                          u8 mask, u8 set)
+{
+       s32 val = i2c_smbus_read_byte_data(client, command);
+       if (val < 0)
+               return val;
+
+       val &= ~mask;
+       val |= set & mask;
+
+       return i2c_smbus_write_byte_data(client, command, val);
+}
+
+static int tw9910_set_scale(struct i2c_client *client,
+                           const struct tw9910_scale_ctrl *scale)
+{
+       int ret;
+
+       ret = i2c_smbus_write_byte_data(client, SCALE_HI,
+                                       (scale->vscale & 0x0F00) >> 4 |
+                                       (scale->hscale & 0x0F00) >> 8);
+       if (ret < 0)
+               return ret;
+
+       ret = i2c_smbus_write_byte_data(client, HSCALE_LO,
+                                       scale->hscale & 0x00FF);
+       if (ret < 0)
+               return ret;
+
+       ret = i2c_smbus_write_byte_data(client, VSCALE_LO,
+                                       scale->vscale & 0x00FF);
+
+       return ret;
+}
+
+static int tw9910_set_hsync(struct i2c_client *client)
+{
+       struct tw9910_priv *priv = to_tw9910(client);
+       int ret;
+
+       /* bit 10 - 3 */
+       ret = i2c_smbus_write_byte_data(client, HSBEGIN,
+                                       (HSYNC_START & 0x07F8) >> 3);
+       if (ret < 0)
+               return ret;
+
+       /* bit 10 - 3 */
+       ret = i2c_smbus_write_byte_data(client, HSEND,
+                                       (HSYNC_END & 0x07F8) >> 3);
+       if (ret < 0)
+               return ret;
+
+       /* So far only revisions 0 and 1 have been seen */
+       /* bit 2 - 0 */
+       if (1 == priv->revision)
+               ret = tw9910_mask_set(client, HSLOWCTL, 0x77,
+                                     (HSYNC_START & 0x0007) << 4 |
+                                     (HSYNC_END   & 0x0007));
+
+       return ret;
+}
+
+static void tw9910_reset(struct i2c_client *client)
+{
+       tw9910_mask_set(client, ACNTL1, SRESET, SRESET);
+       msleep(1);
+}
+
+static int tw9910_power(struct i2c_client *client, int enable)
+{
+       int ret;
+       u8 acntl1;
+       u8 acntl2;
+
+       if (enable) {
+               acntl1 = 0;
+               acntl2 = 0;
+       } else {
+               acntl1 = CLK_PDN | Y_PDN | C_PDN;
+               acntl2 = PLL_PDN;
+       }
+
+       ret = tw9910_mask_set(client, ACNTL1, ACNTL1_PDN_MASK, acntl1);
+       if (ret < 0)
+               return ret;
+
+       return tw9910_mask_set(client, ACNTL2, ACNTL2_PDN_MASK, acntl2);
+}
+
+static const struct tw9910_scale_ctrl *tw9910_select_norm(v4l2_std_id norm,
+                                                         u32 width, u32 height)
+{
+       const struct tw9910_scale_ctrl *scale;
+       const struct tw9910_scale_ctrl *ret = NULL;
+       __u32 diff = 0xffffffff, tmp;
+       int size, i;
+
+       if (norm & V4L2_STD_NTSC) {
+               scale = tw9910_ntsc_scales;
+               size = ARRAY_SIZE(tw9910_ntsc_scales);
+       } else if (norm & V4L2_STD_PAL) {
+               scale = tw9910_pal_scales;
+               size = ARRAY_SIZE(tw9910_pal_scales);
+       } else {
+               return NULL;
+       }
+
+       for (i = 0; i < size; i++) {
+               tmp = abs(width - scale[i].width) +
+                       abs(height - scale[i].height);
+               if (tmp < diff) {
+                       diff = tmp;
+                       ret = scale + i;
+               }
+       }
+
+       return ret;
+}
+
+/*
+ * subdevice operations
+ */
+static int tw9910_s_stream(struct v4l2_subdev *sd, int enable)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+       u8 val;
+       int ret;
+
+       if (!enable) {
+               switch (priv->revision) {
+               case 0:
+                       val = OEN_TRI_SEL_ALL_OFF_r0;
+                       break;
+               case 1:
+                       val = OEN_TRI_SEL_ALL_OFF_r1;
+                       break;
+               default:
+                       dev_err(&client->dev, "un-supported revision\n");
+                       return -EINVAL;
+               }
+       } else {
+               val = OEN_TRI_SEL_ALL_ON;
+
+               if (!priv->scale) {
+                       dev_err(&client->dev, "norm select error\n");
+                       return -EPERM;
+               }
+
+               dev_dbg(&client->dev, "%s %dx%d\n",
+                       priv->scale->name,
+                       priv->scale->width,
+                       priv->scale->height);
+       }
+
+       ret = tw9910_mask_set(client, OPFORM, OEN_TRI_SEL_MASK, val);
+       if (ret < 0)
+               return ret;
+
+       return tw9910_power(client, enable);
+}
+
+static int tw9910_g_std(struct v4l2_subdev *sd, v4l2_std_id *norm)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+
+       *norm = priv->norm;
+
+       return 0;
+}
+
+static int tw9910_s_std(struct v4l2_subdev *sd, v4l2_std_id norm)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+       const unsigned hact = 720;
+       const unsigned hdelay = 15;
+       unsigned vact;
+       unsigned vdelay;
+       int ret;
+
+       if (!(norm & (V4L2_STD_NTSC | V4L2_STD_PAL)))
+               return -EINVAL;
+
+       priv->norm = norm;
+       if (norm & V4L2_STD_525_60) {
+               vact = 240;
+               vdelay = 18;
+               ret = tw9910_mask_set(client, VVBI, 0x10, 0x10);
+       } else {
+               vact = 288;
+               vdelay = 24;
+               ret = tw9910_mask_set(client, VVBI, 0x10, 0x00);
+       }
+       if (!ret)
+               ret = i2c_smbus_write_byte_data(client, CROP_HI,
+                       ((vdelay >> 2) & 0xc0) |
+                       ((vact >> 4) & 0x30) |
+                       ((hdelay >> 6) & 0x0c) |
+                       ((hact >> 8) & 0x03));
+       if (!ret)
+               ret = i2c_smbus_write_byte_data(client, VDELAY_LO,
+                       vdelay & 0xff);
+       if (!ret)
+               ret = i2c_smbus_write_byte_data(client, VACTIVE_LO,
+                       vact & 0xff);
+
+       return ret;
+}
+
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+static int tw9910_g_register(struct v4l2_subdev *sd,
+                            struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       int ret;
+
+       if (reg->reg > 0xff)
+               return -EINVAL;
+
+       reg->size = 1;
+       ret = i2c_smbus_read_byte_data(client, reg->reg);
+       if (ret < 0)
+               return ret;
+
+       /*
+        * ret      = int
+        * reg->val = __u64
+        */
+       reg->val = (__u64)ret;
+
+       return 0;
+}
+
+static int tw9910_s_register(struct v4l2_subdev *sd,
+                            const struct v4l2_dbg_register *reg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+
+       if (reg->reg > 0xff ||
+           reg->val > 0xff)
+               return -EINVAL;
+
+       return i2c_smbus_write_byte_data(client, reg->reg, reg->val);
+}
+#endif
+
+static int tw9910_s_power(struct v4l2_subdev *sd, int on)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+       struct tw9910_priv *priv = to_tw9910(client);
+
+       return soc_camera_set_power(&client->dev, ssdd, priv->clk, on);
+}
+
+static int tw9910_set_frame(struct v4l2_subdev *sd, u32 *width, u32 *height)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+       int ret = -EINVAL;
+       u8 val;
+
+       /*
+        * select suitable norm
+        */
+       priv->scale = tw9910_select_norm(priv->norm, *width, *height);
+       if (!priv->scale)
+               goto tw9910_set_fmt_error;
+
+       /*
+        * reset hardware
+        */
+       tw9910_reset(client);
+
+       /*
+        * set bus width
+        */
+       val = 0x00;
+       if (SOCAM_DATAWIDTH_16 == priv->info->buswidth)
+               val = LEN;
+
+       ret = tw9910_mask_set(client, OPFORM, LEN, val);
+       if (ret < 0)
+               goto tw9910_set_fmt_error;
+
+       /*
+        * select MPOUT behavior
+        */
+       switch (priv->info->mpout) {
+       case TW9910_MPO_VLOSS:
+               val = RTSEL_VLOSS; break;
+       case TW9910_MPO_HLOCK:
+               val = RTSEL_HLOCK; break;
+       case TW9910_MPO_SLOCK:
+               val = RTSEL_SLOCK; break;
+       case TW9910_MPO_VLOCK:
+               val = RTSEL_VLOCK; break;
+       case TW9910_MPO_MONO:
+               val = RTSEL_MONO;  break;
+       case TW9910_MPO_DET50:
+               val = RTSEL_DET50; break;
+       case TW9910_MPO_FIELD:
+               val = RTSEL_FIELD; break;
+       case TW9910_MPO_RTCO:
+               val = RTSEL_RTCO;  break;
+       default:
+               val = 0;
+       }
+
+       ret = tw9910_mask_set(client, VBICNTL, RTSEL_MASK, val);
+       if (ret < 0)
+               goto tw9910_set_fmt_error;
+
+       /*
+        * set scale
+        */
+       ret = tw9910_set_scale(client, priv->scale);
+       if (ret < 0)
+               goto tw9910_set_fmt_error;
+
+       /*
+        * set hsync
+        */
+       ret = tw9910_set_hsync(client);
+       if (ret < 0)
+               goto tw9910_set_fmt_error;
+
+       *width = priv->scale->width;
+       *height = priv->scale->height;
+
+       return ret;
+
+tw9910_set_fmt_error:
+
+       tw9910_reset(client);
+       priv->scale = NULL;
+
+       return ret;
+}
+
+static int tw9910_get_selection(struct v4l2_subdev *sd,
+               struct v4l2_subdev_pad_config *cfg,
+               struct v4l2_subdev_selection *sel)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+
+       if (sel->which != V4L2_SUBDEV_FORMAT_ACTIVE)
+               return -EINVAL;
+       /* Only CROP, CROP_DEFAULT and CROP_BOUNDS are supported */
+       if (sel->target > V4L2_SEL_TGT_CROP_BOUNDS)
+               return -EINVAL;
+
+       sel->r.left     = 0;
+       sel->r.top      = 0;
+       if (priv->norm & V4L2_STD_NTSC) {
+               sel->r.width    = 640;
+               sel->r.height   = 480;
+       } else {
+               sel->r.width    = 768;
+               sel->r.height   = 576;
+       }
+       return 0;
+}
+
+static int tw9910_get_fmt(struct v4l2_subdev *sd,
+               struct v4l2_subdev_pad_config *cfg,
+               struct v4l2_subdev_format *format)
+{
+       struct v4l2_mbus_framefmt *mf = &format->format;
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+
+       if (format->pad)
+               return -EINVAL;
+
+       if (!priv->scale) {
+               priv->scale = tw9910_select_norm(priv->norm, 640, 480);
+               if (!priv->scale)
+                       return -EINVAL;
+       }
+
+       mf->width       = priv->scale->width;
+       mf->height      = priv->scale->height;
+       mf->code        = MEDIA_BUS_FMT_UYVY8_2X8;
+       mf->colorspace  = V4L2_COLORSPACE_SMPTE170M;
+       mf->field       = V4L2_FIELD_INTERLACED_BT;
+
+       return 0;
+}
+
+static int tw9910_s_fmt(struct v4l2_subdev *sd,
+                       struct v4l2_mbus_framefmt *mf)
+{
+       u32 width = mf->width, height = mf->height;
+       int ret;
+
+       WARN_ON(mf->field != V4L2_FIELD_ANY &&
+               mf->field != V4L2_FIELD_INTERLACED_BT);
+
+       /*
+        * check color format
+        */
+       if (mf->code != MEDIA_BUS_FMT_UYVY8_2X8)
+               return -EINVAL;
+
+       mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
+
+       ret = tw9910_set_frame(sd, &width, &height);
+       if (!ret) {
+               mf->width       = width;
+               mf->height      = height;
+       }
+       return ret;
+}
+
+static int tw9910_set_fmt(struct v4l2_subdev *sd,
+               struct v4l2_subdev_pad_config *cfg,
+               struct v4l2_subdev_format *format)
+{
+       struct v4l2_mbus_framefmt *mf = &format->format;
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct tw9910_priv *priv = to_tw9910(client);
+       const struct tw9910_scale_ctrl *scale;
+
+       if (format->pad)
+               return -EINVAL;
+
+       if (V4L2_FIELD_ANY == mf->field) {
+               mf->field = V4L2_FIELD_INTERLACED_BT;
+       } else if (V4L2_FIELD_INTERLACED_BT != mf->field) {
+               dev_err(&client->dev, "Field type %d invalid.\n", mf->field);
+               return -EINVAL;
+       }
+
+       mf->code = MEDIA_BUS_FMT_UYVY8_2X8;
+       mf->colorspace = V4L2_COLORSPACE_SMPTE170M;
+
+       /*
+        * select suitable norm
+        */
+       scale = tw9910_select_norm(priv->norm, mf->width, mf->height);
+       if (!scale)
+               return -EINVAL;
+
+       mf->width       = scale->width;
+       mf->height      = scale->height;
+
+       if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
+               return tw9910_s_fmt(sd, mf);
+       cfg->try_fmt = *mf;
+       return 0;
+}
+
+static int tw9910_video_probe(struct i2c_client *client)
+{
+       struct tw9910_priv *priv = to_tw9910(client);
+       s32 id;
+       int ret;
+
+       /*
+        * tw9910 only use 8 or 16 bit bus width
+        */
+       if (SOCAM_DATAWIDTH_16 != priv->info->buswidth &&
+           SOCAM_DATAWIDTH_8  != priv->info->buswidth) {
+               dev_err(&client->dev, "bus width error\n");
+               return -ENODEV;
+       }
+
+       ret = tw9910_s_power(&priv->subdev, 1);
+       if (ret < 0)
+               return ret;
+
+       /*
+        * check and show Product ID
+        * So far only revisions 0 and 1 have been seen
+        */
+       id = i2c_smbus_read_byte_data(client, ID);
+       priv->revision = GET_REV(id);
+       id = GET_ID(id);
+
+       if (0x0B != id ||
+           0x01 < priv->revision) {
+               dev_err(&client->dev,
+                       "Product ID error %x:%x\n",
+                       id, priv->revision);
+               ret = -ENODEV;
+               goto done;
+       }
+
+       dev_info(&client->dev,
+                "tw9910 Product ID %0x:%0x\n", id, priv->revision);
+
+       priv->norm = V4L2_STD_NTSC;
+       priv->scale = &tw9910_ntsc_scales[0];
+
+done:
+       tw9910_s_power(&priv->subdev, 0);
+       return ret;
+}
+
+static const struct v4l2_subdev_core_ops tw9910_subdev_core_ops = {
+#ifdef CONFIG_VIDEO_ADV_DEBUG
+       .g_register     = tw9910_g_register,
+       .s_register     = tw9910_s_register,
+#endif
+       .s_power        = tw9910_s_power,
+};
+
+static int tw9910_enum_mbus_code(struct v4l2_subdev *sd,
+               struct v4l2_subdev_pad_config *cfg,
+               struct v4l2_subdev_mbus_code_enum *code)
+{
+       if (code->pad || code->index)
+               return -EINVAL;
+
+       code->code = MEDIA_BUS_FMT_UYVY8_2X8;
+       return 0;
+}
+
+static int tw9910_g_mbus_config(struct v4l2_subdev *sd,
+                               struct v4l2_mbus_config *cfg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+
+       cfg->flags = V4L2_MBUS_PCLK_SAMPLE_RISING | V4L2_MBUS_MASTER |
+               V4L2_MBUS_VSYNC_ACTIVE_HIGH | V4L2_MBUS_VSYNC_ACTIVE_LOW |
+               V4L2_MBUS_HSYNC_ACTIVE_HIGH | V4L2_MBUS_HSYNC_ACTIVE_LOW |
+               V4L2_MBUS_DATA_ACTIVE_HIGH;
+       cfg->type = V4L2_MBUS_PARALLEL;
+       cfg->flags = soc_camera_apply_board_flags(ssdd, cfg);
+
+       return 0;
+}
+
+static int tw9910_s_mbus_config(struct v4l2_subdev *sd,
+                               const struct v4l2_mbus_config *cfg)
+{
+       struct i2c_client *client = v4l2_get_subdevdata(sd);
+       struct soc_camera_subdev_desc *ssdd = soc_camera_i2c_to_desc(client);
+       u8 val = VSSL_VVALID | HSSL_DVALID;
+       unsigned long flags = soc_camera_apply_board_flags(ssdd, cfg);
+
+       /*
+        * set OUTCTR1
+        *
+        * We use VVALID and DVALID signals to control VSYNC and HSYNC
+        * outputs, in this mode their polarity is inverted.
+        */
+       if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
+               val |= HSP_HI;
+
+       if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
+               val |= VSP_HI;
+
+       return i2c_smbus_write_byte_data(client, OUTCTR1, val);
+}
+
+static int tw9910_g_tvnorms(struct v4l2_subdev *sd, v4l2_std_id *norm)
+{
+       *norm = V4L2_STD_NTSC | V4L2_STD_PAL;
+       return 0;
+}
+
+static const struct v4l2_subdev_video_ops tw9910_subdev_video_ops = {
+       .s_std          = tw9910_s_std,
+       .g_std          = tw9910_g_std,
+       .s_stream       = tw9910_s_stream,
+       .g_mbus_config  = tw9910_g_mbus_config,
+       .s_mbus_config  = tw9910_s_mbus_config,
+       .g_tvnorms      = tw9910_g_tvnorms,
+};
+
+static const struct v4l2_subdev_pad_ops tw9910_subdev_pad_ops = {
+       .enum_mbus_code = tw9910_enum_mbus_code,
+       .get_selection  = tw9910_get_selection,
+       .get_fmt        = tw9910_get_fmt,
+       .set_fmt        = tw9910_set_fmt,
+};
+
+static const struct v4l2_subdev_ops tw9910_subdev_ops = {
+       .core   = &tw9910_subdev_core_ops,
+       .video  = &tw9910_subdev_video_ops,
+       .pad    = &tw9910_subdev_pad_ops,
+};
+
+/*
+ * i2c_driver function
+ */
+
+static int tw9910_probe(struct i2c_client *client,
+                       const struct i2c_device_id *did)
+
+{
+       struct tw9910_priv              *priv;
+       struct tw9910_video_info        *info;
+       struct i2c_adapter              *adapter =
+               to_i2c_adapter(client->dev.parent);
+       struct soc_camera_subdev_desc   *ssdd = soc_camera_i2c_to_desc(client);
+       int ret;
+
+       if (!ssdd || !ssdd->drv_priv) {
+               dev_err(&client->dev, "TW9910: missing platform data!\n");
+               return -EINVAL;
+       }
+
+       info = ssdd->drv_priv;
+
+       if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_BYTE_DATA)) {
+               dev_err(&client->dev,
+                       "I2C-Adapter doesn't support 
I2C_FUNC_SMBUS_BYTE_DATA\n");
+               return -EIO;
+       }
+
+       priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
+       if (!priv)
+               return -ENOMEM;
+
+       priv->info   = info;
+
+       v4l2_i2c_subdev_init(&priv->subdev, client, &tw9910_subdev_ops);
+
+       priv->clk = v4l2_clk_get(&client->dev, "mclk");
+       if (IS_ERR(priv->clk))
+               return PTR_ERR(priv->clk);
+
+       ret = tw9910_video_probe(client);
+       if (ret < 0)
+               v4l2_clk_put(priv->clk);
+
+       return ret;
+}
+
+static int tw9910_remove(struct i2c_client *client)
+{
+       struct tw9910_priv *priv = to_tw9910(client);
+       v4l2_clk_put(priv->clk);
+       return 0;
+}
+
+static const struct i2c_device_id tw9910_id[] = {
+       { "tw9910", 0 },
+       { }
+};
+MODULE_DEVICE_TABLE(i2c, tw9910_id);
+
+static struct i2c_driver tw9910_i2c_driver = {
+       .driver = {
+               .name = "tw9910",
+       },
+       .probe    = tw9910_probe,
+       .remove   = tw9910_remove,
+       .id_table = tw9910_id,
+};
+
+module_i2c_driver(tw9910_i2c_driver);
+
+MODULE_DESCRIPTION("SoC Camera driver for tw9910");
+MODULE_AUTHOR("Kuninori Morimoto");
+MODULE_LICENSE("GPL v2");
-- 
2.7.4

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